Cisco Systems Cisco CRS-1 manual Removing a DC Power Shelf, Sequence of Tasks

Chapter 2 Installing and Removing Power Components

Removing a DC Power Shelf

Removing a DC Power Shelf

This section describes how to remove a DC power shelf from the Cisco CRS-1 4-slot line card chassis. The DC power shelf is comprised of both the DC power input shelf and the DC power input module (PIM). The DC power shelf encloses four power supplies and the power distribution connections and wiring blocks.

The DC power input shelf is in the front of the chassis; the power input module (PIM) is in the rear of the chassis.

Sequence of Tasks

The sequence of tasks required to remove the DC power shelf is as follows:

1.Bring down all power to the chassis.

2.Disconnect the input power cables.

3.Disconnect the grounding cable.

4.Remove the air intake (inlet) grille.

5.Remove all DC power supplies.

6.Remove the DC power input shelf.

7.Remove the DC power input module (PIM).

Prerequisites

Bring down the power to the Cisco CRS-1 4-slot line card chassis (as described in the steps below).

Required Tools and Equipment

You need the following tools and parts to perform this task:

•ESD-preventive wrist strap

•Medium flat-blade screwdriver

•Number 1 Phillips screwdriver

•Medium Phillips screwdriver

•5 mm Allen wrench

•10 mm hex socket wrench

Note This procedure assumes that the Cisco CRS-1 4-slot line card chassis is already mounted in a rack with sufficient room to access the sides and the bottom of the chassis.

	Cisco CRS-1 Carrier Routing System 4-Slot Line Card Chassis Installation Guide
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